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B12A MkII | User Manual TABLE OF CONTENTS Introduction...........................................................................................................3 Features..................................................................................................................3 Specifications.........................................................................................................3 Package Contents..................................................................................................3 Front........................................................................................................................4 Back........................................................................................................................4 Connection Diagrams............................................................................................5 Signal Flow/Hardware Block Diagram...................................................................5 Repair......................................................................................................................6 Warranty.................................................................................................................6 Disclaimer...............................................................................................................6 Copyright................................................................................................................7 B12A MkII | User Manual 2 INTRODUCTION What happens when you take the stately B12A and add some extra special sauce? You get the B12A MkII! With a titillating CineMag input transformer, less noise, and more API-style gain than ever before, the B12A MkII will sweeten your preamp collection for years to come! FEATURES • • • • • Cinemag Input Transformer Edcor Output Transformer 70dB Gain Hi-Z Input (passive, unbalanced) Phantom Power • • • • 18dB Pad Phase Switch XLR Microphone Input TRS Line Output (balanced) SPECIFICATIONS Mic Section • Max Microphone Input Level: +1dBu • Input Impedance: 200Ω • Pad: 18dB • Gain (no pad): +26dB to +70dB • Equivalent Input Noise (noise floor): -120dB • THD+N: • .01% @ +26dB Gain • .011% @ +40dB Gain • .049% @ +60dB Gain • .15% @ +70dB Gain • Bandwidth (1kHz, 150Ω source, unweighted): 10Hz to 30kHz D.I. Section • Max D.I. Input Level: +18dBu • Input Impedance: 500kΩ • Pad: none • Gain: +10dB to +53dB • Equivalent Input Noise (noise floor): -102dB • THD+N: • .008% @ +10dB Gain • .01% @ +25dB Gain • .03% @ +40dB Gain • .14% @ +53dB Gain • Bandwidth (1kHz, 600Ω unbalanced source, unweighted): 10Hz to 30kHz Output Section • Max Output Level: +28dBu • Output Impedance: 600Ω Power Supply • 24VAC, 500mA External Supply Product Dimensions • 9.5” x 6.5” x 1.75” Product Weight • 3.2 lbs Shipping Dimensions • 13” x 11” x 5” Shipping Weight • 5.5 lbs PACKAGE CONTENTS • B12A MkII • Power Supply (wall wart) • ½ Rack Connector Plate B12A MkII | User Manual 3 FRONT 1 2 3 4 5 6 7 1. POWER: flip switch up to turn preamp on, flip switch down to turn preamp off 2. 48V: engage to turn phantom power on, disengage to turn phantom power off 3. PHASE: engage to adjust input signal polarity by 180°, disengage to leave input signal polarity unchanged 4. PAD: engage to reduce input signal amplitude by 18dB, disengage to leave input signal amplitude unchanged 5. GAIN: clockwise rotation yields an increase in output signal amplitude, counterclockwise rotation yields a decrease in output signal amplitude 6. Hi-Z: engage to use front panel Hi-Z IN as preamp source, disengage to use XLR input as preamp source 7. Hi-Z IN: input jack for use with high impedance, unbalanced sources (GAIN knob adjusts signal amplitude) BACK 1 2 3 4 1. OUTPUT: balanced, line-level TRS output 2. INPUT: balanced, mic-level XLR input 3. GND: internal chassis ground 4. POWER: 24VAC input jack (only use a B.L.A.-specified power supply) B12A MkII | User Manual 4 CONNECTION DIAGRAMS LEGEND Digital Audio Analog Audio Data Clock TRACKING Multi FX unit Monitor controller/ 500 series lunchbox w/6 channels of SIGNAL FLOW/HARDWARE BLOCK DIAGRAM Hi-Z IN Input B12A MkII | User Manual 5 REPAIR To reduce the risk of fire or electric shock, the user should not attempt to repair the device in the event of a failure. Repairs should be referred to qualified service personnel only. Please contact Black Lion Audio if you need assistance. WARRANTY We extend a two-year warranty on defects in materials and workmanship for all Black Lion Audio products from the date of purchase. This does not cover user error, wear, tear, or abuse. Should your B.L.A. product experience any problems or failures during the warranty period, immediately contact us, and we will gladly correct the issue at no charge (excluding shipping). DISCLAIMER For your safety, please read the following! Grounding: For your safety, do not defeat the grounding connection. Use the device only when it is properly grounded. Liquids, water, and moisture: The device should not be used near water, or when it is wet. Care should be taken so that it remains dry. Be sure to keep the device away from rain or other moisture. Power: The device should be connected to a power supply only of the type described in the user manual and/or as marked on the rear panel. Power cables: Power supply cables should not be routed under carpets, or where they are likely to be walked on or pinched by items placed upon or against them. Do not use power supply cables that have become worn or frayed. Multiple-input voltage: The device may require the use of a different power supply, power plug, cable, or both, depending on the available power connection in your area. B12A MkII | User Manual 6 1801 W. BELLE PLAINE AVE., SUITE 102 CHICAGO, IL 60613 [email protected] 773-549-1885 BLACKLIONAUDIO.COM Copyright © 2015 Black Lion Audio, Inc. All rights reserved. This manual and any associated artwork, product designs, and design concepts are subject to copyright protection. No part of this document may be reproduced in any form without prior written permission of Black Lion Audio, Inc.